DDR1 SDRAM – the first memory in the DDR family has a synchronous interface, active on both edges of the clock signal. A DDR1 interface enables data transfer rates up to 3200 MB/s via a 64-bit bus.

DDR2 SDRAM – the second generation of DDR memory operates with reduced supply voltage and power consumption. The lower voltage allows the maximum clock rate to be increased to 800 MHz, leading to transfer rates up to 6400 MB/s (with a 64-bit interface).

DDR3 SDRAM – currently it’s the most commonly used DRAM type. Lower power consumption and high capacity make it suitable for a wide range of industrial applications. With the use of a “fly-by” bus, DDR3 may run with a clock rate of up to 1866 MHz.

DDR4 SDRAM – the latest generation of memory in the DDR family. It features a POD12 (Pseudo Open Drain 1.2 V) interface, CRC (Cyclic Redundancy Check) on the data bus, parity control on the address bus, and a DBI (Data Bus Inversion) function. The new features of the DDR4 interface enable memory clock rates above 2400 MHz, making it
an ideal solution for high-performance industrial systems.